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Hi together,i´m trying to set up a communication via usb using the usb cdc class to communicate with additional software via a virtual com port running on a local pc using the Nucleo G474RE board.However i can't find a sufficient documentation what i do have to implement / settings that have to be done to send and recieve data.I`ve also watched the youtube tutorial from stm on the topic usb cdc but it didn't help me. I made the following steps until now in the cube ide:I´ve activated the usb in the communication section and the usb_device in the middleware where i also set the communication device class option. Afterwards i solved the clock issue using the HSI48RC clock for usb. But from that on the next steps are unclear to me. Can i now just use the "uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len)" function to transmit data? This function is located in the usbd_cdc_if.h/c file.  I tried a short example using this function to send a short hello world char

I couldn't find information about the topmaking for the nano sensor LPS22HB on the datasheet, I need to implement a visual inspection for this IC.Does anyone knows where I can find this info? 

My ongoing difficulties running FATFS on an SD card has uncovered a problem! A read of the boot sector does not read all the data correctly, specifically the first 16 bytes are all zero. This means that FATFS reports there is no filesystem. The code I'm running is all CubeMX HAL stuff, so I'm at a loss what the problem is. 16 bytes is 1 DMA burst, so that might be significant. Here are screenshots of the SD boot sector, firstly as read by my PC, secondly as read during f_mount() by my STM32F767. 

I am using SMBus to communicate with a smart battery. After looking at the code, I decided against using the SMBUS middleware but to directly using the HAL_SMBUS_xxx calls. My STM32G491 is the host and sending read-word commands to the battery works just fine. The bit I'm confused about how to receive commands emitted by the battery itself.I can see that the battery periodically emits a byte. The value is 0x12 and is by default NACKed. If I treat this value as the host's node address (i.e. 7-bit address 0x09) and set OwnAddress1 to 0x12, the byte is ACKed and another byte (0x14) appears on the bus about 25ms later, which is NACKed. There is another similar exchange about a second later. The error callback is called, apparently because of a timeout. The bus is now stuck in the state HAL_SMBUS_STATE_MASTER_BUSY_TX and I don't know how I'm supposed to clear this. Now sending further read-words commands fail because the bus is "busy".I'm still looking into this but would appreciate any ins

Hello, I have been working with the STM32U5 MCU and to start I worked through the workshop found here:STM32U5 Workshop (rristm.github.io) As part of the workshop the USART1 is setup in continuous communication mode. Is it possible to setup SPI in a similar way for continuous communication? Thanks,UL

Hello,  I have been using the STM32F4 chip for a while but I ran into an issue when trying to communicate with an ADC to sample at 200kHz. So I have started to work with the STM32U5 chip. My goal is to use the SPI RDY feature or the GPDMA triggered from an external interrupt in order to handle the spi communication and fill a buffer. Unfortunately I have been struggling to find good resources on how to use these features or examples that I can try to follow through. I am able to do spi communication that are called from the main process but I can't get a message to trigger from an external interrupt.  Any advice on how I can learn about these features would be greatly appreciated, I have also included the code as I have it thus far. Thanks!

hi guys, I hope this message finds you well. I am currently working with the STM32H743Eval2 evaluation board, and I'm facing a challenge with the smaller pins on the board. Specifically, I've noticed that the standard-sized pins do not fit in these smaller pin slots. how can I reach these pins.   Thank you very much for your time and assistance.

Wondering what is the cost of using SHCI_C2_BLE_INIT_OPTIONS_REDUC_GATTDB_NVM overSHCI_C2_BLE_INIT_OPTIONS_FULL_GATTDB_NVM ? The first one can gets me 33% increase in bonding list size but I could not find what does it prevent me from using?

Hello, at the moment i am developing BLE software for STM32WB5 and it works fine. The updater of the BLESensor App is working well and we can update new firmware any time. But there is one question, where we can not find an awnser. Is there any possibility to perform the ota update from a pc or a web based solution? We don't want to use a smartphone or tablet for it. Can anyone help to solve the problem. Thanks. best regards

Hello, I am trying to play wav audio files from and sd card. The reading of the data works fine but the BSP_AUDIO_OUT_Play doesnt work, It get stuck inside the Dafult handler infinite loop.     

Hi i am using STM32G474VET3 controller having below clock input range– 4 to 48 MHz crystal oscillator i am using 16 MHz right now. What is the significance if i use 32 MHz crystal or increase my crystal value. Does it increase speed for instruction execution . as max is 170MHz (i guess nby internal PLL)The STM32G473xB/xC/xE devices are based on the high-performance Arm® Cortex®-M432-bit RISC core. They operate at a frequency of up to 170 MHz.    

I AM USING IN USB_HS DEVICE MODE ,WHEN I CONNECT USB CABLE TO THE PC THEN I WANT  TO KNOWE WHERE IT IS DETECT AND AFTER THAT I REMOVE USB CABLE THEN WHRE IT IS DETECT GIVE ME ANY REGISTER OR CALL BACK FUNCTION ONLY TELL ME IN DEVICE MODE

This is not a question, it is more an "experience report", related to find "reliability issues" (flaws) in my FW.Many people know: there is a HardFault_Handler: called when something goes wrong (e.g. accessing a not-existing memory address, e.g. address 0 (NULL), e.g. because of an uninitialized pointer.But the ARM Cortex MCUs have also other "traps" (INT vectors), e.g. also for MemManage_Handler, BusFault_Handler, ...In my case:after 1 hour or longer, the FW has crashed (randomly, a variable period of time until crash)It has hit the "MemManage_Handler" (often not really implemented to act on it, people focus on "HardFault_Handler" only)During Debugging my FW which has crashed (let it run with debugger connected), I came to this observation:there was an interrupt (for USB VCP) and afterwardsthe code was executed from "somewhere else" until it has hit the "MemManage_Handler"after checking what is going on, where is the PC, what is the LR register, the SP etc.I have realized: the code tr

Hello everyone, i am working on a software for setting the date and time. The plan is to set the date and tame manually (so no defficulties regarding that) and then continue to increase within the time flies thanks to the RTC of the NUCLEO F401RE.  Do you think that would be possible ? Would it be a simple way to set the date and time, by directly using the RTC with HAL libraries for example ?  Im thanking you already for your answers, XOXO

Hi,I have successfully installed STM32 vscode extension (v2.0.1) and able to create and build new projects with various MCU.However, I can't find STM32H757ZI from the device list presented by the extension.How can I fix the problem? 

Hi Team,I have STM32L562 EDK with me , and can i make a USB PD application with that alone ?, or should i buy x-nucleo-snk1m1 which has TCPP01 for port protection?Expecting a quick replyThanks in advanceNithin

Hi,I'm looking into introducing STM32 Secure Boot and Secure Firmware Update based on X-CUBE-SBSFU library on my project with app based on CubeMX v6.11.1 (BSP1.28.0).I noted in CubeMX the MPU option is still not available for FreeRTOS - which is used by my application.It looks like the Secure Boot will be using MPU, but the app won't - will this become a showstopper for Secure Boot? Thanks,Torben

I use the ST25DV04KC. I initialize the chip and write to like the eval software the CCFile to Block 0 this works. In this state the chip is CCFile unlocked, the NFC-Tag protocol is selected to Type5, RFMngt_Dyn is in NFC off mode (0x01) and I2C secure session is open. After all this, the function NDEF_DEMO_Write_URI_URL() is called. Same function like the Demo-Eval. But no register is written. On I2C, I receive at write to the EEPROM, NAK.Only the first Block (0) is filled with values.If I restart the microconroller with power ON->OFF->ON, It works. And in EEPROM is the NDEF URL and works with the smartphone.Now also Block (1...+) and more are filled with valuesSomething is there witch is blocking the chip by configuration. Is there something to pay attention to by configuring the chip?

Wrong ADC3 Oversampling Ration selection for STM32H743. It is for STM32H72xx and STM32H73xx, it should a numeric value from 1 to 1024 (RM0433 page 1014). The generated code will generate an compilation error : 'ADC3_OVERSAMPLING_RATIO_2' undeclared (first use in this function); did you mean 'IS_ADC_OVERSAMPLING_RATIO'?#if defined(ADC_VER_V5_V90) /** @defgroup ADC_HAL_EC_OVS_RATIO Oversampling - Ratio * @{ */ #define ADC3_OVERSAMPLING_RATIO_2 (LL_ADC_OVS_RATIO_2) /*!< ADC oversampling ratio of 2 (2 ADC conversions are performed, sum of these conversions data is computed to result as the ADC oversampling conversion data (before potential shift). Applicable for ADC3 on devices STM32H72xx and STM32H73xx */ #define ADC3_OVERSAMPLING_RATIO_4 (LL_ADC_OVS_RATIO_4) /*!< ADC oversampling ratio of 4 (4 ADC conversions are performed, sum of these conversions data is computed to result as the ADC oversampling conversion data (before potential shift). Applicable for ADC3 on de

Hi, I did a PCB based on the ALED6001 and using the eDesign Suite.I want to use analog dimming only and wired it up similar than in the STEVAL-ILL072V1.Best case i wanted to achieve a 0-100% dimming but it was clear that, due to that curve provided in the datasheet that would not the case. That wouldn't be a big problem if I won't face the big instabilities at the two discontinuity points at 260mV and 1.2V. At the lower end the LED flickers and the coil I am using does a humming sound. At the upper end the brightness increases suddenly to full brightness.Does someone have an idea how this could be solved in a MCU-less design?I tried both topologies (boost and buck-boost) by modifying one board. Seems the eDesign solution (buck-boost?) works a bit better. Maybe because of the proper calculated compensation circuit?I attached the schematic. The red lines on the second sheet are my modification from the one topology to the other.Thanks in advanceDavid 

We are currently using Flutter for our NFC App development, and used the 'Flutter_nfc_kit' package for NFC Connection. We have successfully implemented the Android's workflow. The workflow consists of :1) Get UID2) invoke custom command of GetRandomNumber3) Use the GetRandomNumber values to encrypt the password that is going to be entered4) invoke custom command of PresentPassword with the encrypted password5) Retrieve the data from the password-locked memory In Android, it all went well but when we built the iOS version, we encountered some errors. The code that we used for the Android device for the transceive bytes format are exactly the same, but in iOS,it throws an error of : Tag Connection Lost (when I didn't input the IC Mfg. Code) and Stack Error (when I input the IC Mfg. Code). This is the example of the code that we sent for the 'GetRandomNumber' command =>[0x20 (request flags), 0xB4 (OpCode), 0x02 (IC Mfg. Code), UID]. I have set up the iOS info.plist file

Hello team, I am using the default generated code on STM32H725 uC for ADC1. I am using it in polling mode. The value what I get in ADC DR is 10 times less than the value that I expected. I tried this for various voltage range on its external pins. I am using the ADC1 in single end mode. Also, I am using a external ref of 3.3V Thank you in advance.

I have been trying to resolve the issue for receiving the CAN interrupt but not able to find the root cause.Hardware is a custom board micro is STM32F405RGT6 i am using CAN1 for CAN communication with 500 Kbps.Able to transmit message CAN message using polling method. I am transmitting CAN messages from Peak CAN tool but not able to hit the receive interrupt.Few observations after reset, the DBF bit is set, will it be a problem?1.2.I have the Tx interrupt enabledBut the TMEIE bit is not set after calling the MX_NVIC_Init(void)Coming to the actual problem the FMPIE0 bit is set and i am sending the messages at 1sec interval FMP0 is always 0. What is the problem? int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE BEGIN 1 */ TxHeader.IDE = CAN_ID_STD; TxHeader.StdId = 0x7df; TxHeader.RTR = CAN_RTR_DATA; TxHeader.DLC = 8; TxData[0] = 8; TxData[1] = 2; TxData[2] = 1; TxData[3] = 0xd; TxData[4] = 0; TxData[5] = 0; TxData[6] = 0; TxData[7

Some people might ask: "how to connect a debugger on Portenta H7?"the Portenta H7 MCU module does not have a debugger connector (just tiny solder pads)you need the Breakout Board, or the Vision Shield (both provide the debugger header)STLINK-V3 comes with a ribbon cable which fitsusing the STLINK-V3MINI: you need an adapter (or similar cable to build)Here, how the debugger connection looks like:Remarks:Even the debugger has a T_VCC pin - it does not provide power for the target! Instead, it is used in order to sense (measure) the target VDD so that debugger can adapt the debug signals (e.g. 3V3 vs. 1V8 on MCU).The GNDDetect signal is not signal ground (use one or the two other GND). It is used by debugger to realize if there is a cable connection to the target.T_VCC and GNDDectect have to be connected: otherwise, the debugger will complain all the time that it does not find the target.SWO (used for SWV, the SWO Viewer, for debug messages via debugger), could conflict with a pin functio

Hello,  I'm working on a project for a Nucleo board for which I'm trying to use VSCode. I've installed the relevant extensions, and building and running the project had been working, but suddenly (after changing the .ioc file in CubeMX) it stopped working (even when I undid my change); now, every time I build or clean build, I get the error: collect2.exe: error: ld returned 1 exit statusMAKE.EXE: *** [STM32Make.make:211: build/CTS-SAT-1_FW.elf] Error 1 The file in question here seems to say this: $(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) STM32Make.make    $(CC) $(OBJECTS) $(LDFLAGS) -o $@    $(SZ) $@ Alas, this is entirely incomprehensible to me. Can anyone help me figure this out? Thank you!